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Study design - Coggle Diagram
Study design
Ecological study
study unit is a group
observational
Variables
aggregate measures
environmental measures
global measures
Advantages
use of data already collected
feasible
absence of bioethical issues of direct research with human beings
limitations
Eological fallacy
inability to establish casual relationships
Cross-sectional study
group
exposed
Develop outcome
no outcome
unexposed
develop outcome
no outcome
advantage
quick execution
feasible
quick establishment of association
limitation
low utility in infrequent pathologies
inability to establish casual relationship